Changed Ecologies

The conflict that killed the previous civilization permanently influenced the ecology of the planet in a number of ways.

Extinct Species
Many animal species went extinct at the end of the last civilization. The more specialized species had the hardest time adapting with polluted and changing climates, and were more prone to disease.
 * Beaver
 * Many species of reef animal
 * Manatee

Thriving Species
Some species, lacking human interference or natural predators, have ironically thrived
 * Loons (man removed from habitats)
 * Northern Coyotes (feed on white tail deer)
 * Northern Wolves (feed on white tail deer)
 * Cetacean species (whales)
 * Dolphins
 * Orca

Mutated Species

 * Glowbirds aka Twilight Ravens: They come from a toxic area, and shimmer twilight colors. Their eyes have adapted to the violet hour.